# File lib/facter/util/ip.rb, line 157
  def self.get_single_interface_output(interface)
    output = ""
    case Facter.value(:kernel)
    when 'OpenBSD', 'NetBSD', 'FreeBSD', 'Darwin', 'GNU/kFreeBSD', 'DragonFly'
      output = Facter::Util::IP.ifconfig_interface(interface)
    when 'Linux'
      ifconfig_output = Facter::Util::IP.ifconfig_interface(interface)
      if interface =~ /^ib/ then
        real_mac_address = get_infiniband_macaddress(interface)
        output = ifconfig_output.sub(%r{(?:ether|HWaddr)\s+((\w{1,2}:){5,}\w{1,2})}, "HWaddr #{real_mac_address}")
      else
        output = ifconfig_output
      end
    when 'SunOS'
      output = Facter::Util::IP.exec_ifconfig([interface])
    when 'HP-UX'
       mac = ""
       ifc = hpux_ifconfig_interface(interface)
       hpux_lanscan.scan(/(\dx\S+).*UP\s+(\w+\d+)/).each {|i| mac = i[0] if i.include?(interface) }
       mac = mac.sub(/0x(\S+)/,'\1').scan(/../).join(":")
       output = ifc + "\n" + mac
    when 'AIX'
        output = Facter::Util::IP.ifconfig_interface(interface) + "\n" + aix_get_mtu(interface) + "\n" + aix_get_macadress(interface)
        output
    end
    output
  end